Bump boto3 from 1.21.4 to 1.21.6 in /tests (#196)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

tests/requirements.txt

@@ -1,3 +1,3 @@
 requests==2.27.1
-boto3==1.21.4
+boto3==1.21.6
 pytest==7.0.1